The death toll from wildfires that have ravaged the United States’ West Coast has risen to 35 as the National Weather Service has issued a “red flag warning” amid high winds and dry conditions in Oregon and some California counties.

Authorities said the conditions are expected to “contribute to a significant spread of new and existing fires”, amid days of blazes across the states of California, Oregon and Washington that have destroyed neighbourhoods and forest land, leaving barren and grey landscapes the size of New Jersey.

At least 35 active fires were burning in the state, as drought conditions, extreme temperatures, and high winds created the “perfect firestorm” for the blazes to grow, Governor Kate Brown said.